获取线程的名称,获取所有线程，线程问题开启和关闭20190227

1.获取线程的名称 参考：https://blog.csdn.net/luyaran/article/details/80595772   public class Main extends Thread {    public static void main(String[] args) {       Main t1 = new Main();       t1.setName("threa

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